抄録
Thermochemical stabilities of O2+(Ar)n, O4+(Ar)n, and O6+(Ar)n were determined with a pulsed electron-beam mass spectrometer. All ions Om+ with m=2, 4, and 6 are found to accommodate two Ar atoms favorably; shell structures, Om+(Ar)2(Ar)n-2 are formed. The structures of O2+(Ar)2, O4+(Ar)2, and O6+(Ar)2 were discussed based on ab initio calculations.
